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Summary: Cell, Vol. 76, 901-912, March 11, 1994, Copyright 0 1994 by Cell Press
Meiotic Chromosome Pairing in Maize Is Associated
with a Novel Chromatin Organization
Ft. Kelly Dawe,' John W. Sedat,t David A. Agard,t
and W. Zacheus Cande*
*Department of Molecular and Cell Biology
University of California
Berkeley, California 94720
tDepartment of Biochemistry and Biophysics
and Howard Hughes Medical Institute
University of California, San Francisco
San Francisco, California 94143
Summary
Three-dimensional light microscopy and the excellent
cytological features of maize melotic chromosomes
are used to analyze the early events of chromosome
synapsis. We demonstrate that the chromosomes un-
dergo a dramatic structural reorganization prior to syn-
apsis in zygotene. The unique features of prezygotene
chromosomes are a partial separation of sister chro-
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